Transverse Waves - particle displacement is perpendicular to the direction of wave propagation. The animation shows a one-dimensional transverse plane wave propagating from left to right. The particles do not move along with the wave; they simply oscillate up and down about their individual equilibrium positions as the wave passes by. Animation courtesy of Dr. Dan Russell, Kettering University.

instructional materials on quantum physics, each set of teaching-learning materials integrates interactive visualizations with inexpensive materials and written documents in an activity-based environment: software, publications